In many professions and scenarios, keeping a means for escaping unlawful restraint by handcuffs is a wise tactic. Before now, that usually meant something like safety pinning or taping a handcuff key to somewhere on your person.
The TIHK goes the extra mile - it's very small yet features an integrated clip. Pretty cool.
At $5 a pop when purchased in lots of 4, might not be a bad idea to get a few to stash various places.
Available now via the good people at Vigilant Gear.